Hello; Tugboats towing cargo ships in the most important ports port tugs used to tow the largest ships in the world such as container ships, ro ro ships, bulk carriers or oil tankers the biggest tugboats in the world used by major tugboats companies to provide port towing, salvage, escort services or firefighting the most powerful tugboats in the world, tugboats pulling ships, gdifferent types of tugboats, technical details about what tugboats are and how do tugboats work. A tugboat or tug is a marine vessel that manoeuvres other vessels by pushing or pulling them, with direct contact or a tow line. These boats typically tug ships that cannot move well on their own, such as those in crowded harbours or narrow canals, or those that cannot move at all, such as barges, disabled ships, log rafts, or oil platforms. Some are ocean-going, some are icebreakers or salvage tugs. Early models had steam engines, and modern ones have diesel engines. Many have deluge guns, which help in firefighting, especially in harbours.